*{
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
}
.div{
    width: 800px;
    height: 1100px;
    box-shadow: 0 0 5px #000;
    margin: 0 auto;
    overflow: hidden;
}
header{
    width: 100%;
    height: 120px;
    display: flex;
    // align-items: center;
    h4{
        margin-left: 20px;
        font-size: 30px;
        margin-top: 30px;
    }
    input{
        width: 350px;
        height: 37px;
        margin-left: 50px;
        border: 1px solid #ccc;
        margin-top: 30px;
    }
    button{
        height: 35px;
        width: 60px;
        background-color: #f6c443;
        border: none;
        margin-top: 30px;
        margin-left: -5px;
    }
    .logo{
        float: left;
        width: 100px;
    }
    .nav{
        float: right;
        width: 700px;
        ul{
            margin-left: 10px;
            li{
                float: left;
                margin-top: 20px;
                margin-left: 20px;
            }
        }
    }
}
.one{
    width: 100%;
    height: 300px;
    background-color: rgb(255, 227, 232);
    .oneleft{
        width: 200px;
        height: 300px;
        background-color: bisque;
        float: left;
    }
    .onecenter{
        width: 400px;
        height: 300px;
        float: left;
        overflow: hidden;
        .octop{
            width: 400px;
            height: 180px;
            .ocbanner{
                width: 300px;
                height: 180px;
                background-color: chocolate;
                float: left;
                overflow: hidden;
                .page img{
                    width: 300px;
                    height: 180px;
                }
                
            }
            .ocright{
                width: 100px;
                height: 180px;
                background-color: coral;
                float: right;
            }
        }
        .ocdown{
            width: 400px;
            height: 120px;
            background-color: chartreuse;
        }
    }
    .oneright{
        width: 200px;
        height: 300px;
        background-color: burlywood;
        float: right;
    }
}
.two{
    width: 100%;
    height: 300px;
    background-color: aqua;
    margin-top: 20px;
}
.three{
    width: 100%;
    height: 350px;
    background-color: beige;
    margin-top: 10px;
}
